/*
* dyngen helpers
- *
+ *
* Copyright (c) 2003 Fabrice Bellard
*
* This library is free software; you can redistribute it and/or
*/
int __op_param1, __op_param2, __op_param3;
-int __op_jmp0, __op_jmp1, __op_jmp2, __op_jmp3;
-
-#ifdef __i386__
-static inline void flush_icache_range(unsigned long start, unsigned long stop)
-{
-}
+#if defined(__sparc__) || defined(__arm__)
+ void __op_gen_label1(){}
+ void __op_gen_label2(){}
+ void __op_gen_label3(){}
+#else
+ int __op_gen_label1, __op_gen_label2, __op_gen_label3;
#endif
+int __op_jmp0, __op_jmp1, __op_jmp2, __op_jmp3;
-#ifdef __s390__
+#if defined(__i386__) || defined(__x86_64__) || defined(__s390__)
static inline void flush_icache_range(unsigned long start, unsigned long stop)
{
}
-#endif
-
-#ifdef __ia64__
+#elif defined(__ia64__)
static inline void flush_icache_range(unsigned long start, unsigned long stop)
{
+ while (start < stop) {
+ asm volatile ("fc %0" :: "r"(start));
+ start += 32;
+ }
+ asm volatile (";;sync.i;;srlz.i;;");
}
-#endif
-
-#ifdef __powerpc__
+#elif defined(__powerpc__)
#define MIN_CACHE_LINE_SIZE 8 /* conservative value */
{
unsigned long p;
- p = start & ~(MIN_CACHE_LINE_SIZE - 1);
+ start &= ~(MIN_CACHE_LINE_SIZE - 1);
stop = (stop + MIN_CACHE_LINE_SIZE - 1) & ~(MIN_CACHE_LINE_SIZE - 1);
-
+
for (p = start; p < stop; p += MIN_CACHE_LINE_SIZE) {
asm volatile ("dcbst 0,%0" : : "r"(p) : "memory");
}
asm volatile ("sync" : : : "memory");
asm volatile ("isync" : : : "memory");
}
-#endif
-
-#ifdef __alpha__
+#elif defined(__alpha__)
static inline void flush_icache_range(unsigned long start, unsigned long stop)
{
asm ("imb");
}
-#endif
-
-#ifdef __sparc__
-
+#elif defined(__sparc__)
static void inline flush_icache_range(unsigned long start, unsigned long stop)
{
unsigned long p;
for (; p < stop; p += 8)
__asm__ __volatile__("flush\t%0" : : "r" (p));
}
-
-#endif
-
-#ifdef __arm__
+#elif defined(__arm__)
static inline void flush_icache_range(unsigned long start, unsigned long stop)
{
register unsigned long _beg __asm ("a1") = start;
register unsigned long _flg __asm ("a3") = 0;
__asm __volatile__ ("swi 0x9f0002" : : "r" (_beg), "r" (_end), "r" (_flg));
}
-#endif
+#elif defined(__mc68000)
-#ifdef __mc68000
-#include <asm/cachectl.h>
+# include <asm/cachectl.h>
static inline void flush_icache_range(unsigned long start, unsigned long stop)
{
cacheflush(start,FLUSH_SCOPE_LINE,FLUSH_CACHE_BOTH,stop-start+16);
}
+#elif defined(__mips__)
+
+#include <sys/cachectl.h>
+static inline void flush_icache_range(unsigned long start, unsigned long stop)
+{
+ _flush_cache ((void *)start, stop - start, BCACHE);
+}
+#else
+#error unsupported CPU
#endif
#ifdef __alpha__
#ifdef __arm__
-#define MAX_OP_SIZE (128 * 4) /* in bytes */
-/* max size of the code that can be generated without calling arm_flush_ldr */
-#define MAX_FRAG_SIZE (1024 * 4)
-//#define MAX_FRAG_SIZE (135 * 4) /* for testing */
+#define ARM_LDR_TABLE_SIZE 1024
typedef struct LDREntry {
uint8_t *ptr;
uint32_t *data_ptr;
+ unsigned type:2;
} LDREntry;
static LDREntry arm_ldr_table[1024];
-static uint32_t arm_data_table[1024];
+static uint32_t arm_data_table[ARM_LDR_TABLE_SIZE];
extern char exec_loop;
}
static uint8_t *arm_flush_ldr(uint8_t *gen_code_ptr,
- LDREntry *ldr_start, LDREntry *ldr_end,
- uint32_t *data_start, uint32_t *data_end,
+ LDREntry *ldr_start, LDREntry *ldr_end,
+ uint32_t *data_start, uint32_t *data_end,
int gen_jmp)
{
LDREntry *le;
int offset, data_size, target;
uint8_t *data_ptr;
uint32_t insn;
-
- data_size = (uint8_t *)data_end - (uint8_t *)data_start;
+ uint32_t mask;
+
+ data_size = (data_end - data_start) << 2;
if (gen_jmp) {
/* generate branch to skip the data */
arm_reloc_pc24((uint32_t *)gen_code_ptr, 0xeafffffe, target);
gen_code_ptr += 4;
}
-
+
/* copy the data */
data_ptr = gen_code_ptr;
memcpy(gen_code_ptr, data_start, data_size);
gen_code_ptr += data_size;
-
+
/* patch the ldr to point to the data */
for(le = ldr_start; le < ldr_end; le++) {
ptr = (uint32_t *)le->ptr;
- offset = ((unsigned long)(le->data_ptr) - (unsigned long)data_start) +
- (unsigned long)data_ptr -
+ offset = ((unsigned long)(le->data_ptr) - (unsigned long)data_start) +
+ (unsigned long)data_ptr -
(unsigned long)ptr - 8;
- insn = *ptr & ~(0xfff | 0x00800000);
if (offset < 0) {
- offset = - offset;
- } else {
- insn |= 0x00800000;
- }
- if (offset > 0xfff) {
- fprintf(stderr, "Error ldr offset\n");
+ fprintf(stderr, "Negative constant pool offset\n");
abort();
}
- insn |= offset;
+ switch (le->type) {
+ case 0: /* ldr */
+ mask = ~0x00800fff;
+ if (offset >= 4096) {
+ fprintf(stderr, "Bad ldr offset\n");
+ abort();
+ }
+ break;
+ case 1: /* ldc */
+ mask = ~0x008000ff;
+ if (offset >= 1024 ) {
+ fprintf(stderr, "Bad ldc offset\n");
+ abort();
+ }
+ break;
+ case 2: /* add */
+ mask = ~0xfff;
+ if (offset >= 1024 ) {
+ fprintf(stderr, "Bad add offset\n");
+ abort();
+ }
+ break;
+ default:
+ fprintf(stderr, "Bad pc relative fixup\n");
+ abort();
+ }
+ insn = *ptr & mask;
+ switch (le->type) {
+ case 0: /* ldr */
+ insn |= offset | 0x00800000;
+ break;
+ case 1: /* ldc */
+ insn |= (offset >> 2) | 0x00800000;
+ break;
+ case 2: /* add */
+ insn |= (offset >> 2) | 0xf00;
+ break;
+ }
*ptr = insn;
}
return gen_code_ptr;
#endif /* __arm__ */
-
-
+#ifdef __ia64
+
+/* Patch instruction with "val" where "mask" has 1 bits. */
+static inline void ia64_patch (uint64_t insn_addr, uint64_t mask, uint64_t val)
+{
+ uint64_t m0, m1, v0, v1, b0, b1, *b = (uint64_t *) (insn_addr & -16);
+# define insn_mask ((1UL << 41) - 1)
+ unsigned long shift;
+
+ b0 = b[0]; b1 = b[1];
+ shift = 5 + 41 * (insn_addr % 16); /* 5 template, 3 x 41-bit insns */
+ if (shift >= 64) {
+ m1 = mask << (shift - 64);
+ v1 = val << (shift - 64);
+ } else {
+ m0 = mask << shift; m1 = mask >> (64 - shift);
+ v0 = val << shift; v1 = val >> (64 - shift);
+ b[0] = (b0 & ~m0) | (v0 & m0);
+ }
+ b[1] = (b1 & ~m1) | (v1 & m1);
+}
+
+static inline void ia64_patch_imm60 (uint64_t insn_addr, uint64_t val)
+{
+ ia64_patch(insn_addr,
+ 0x011ffffe000UL,
+ ( ((val & 0x0800000000000000UL) >> 23) /* bit 59 -> 36 */
+ | ((val & 0x00000000000fffffUL) << 13) /* bit 0 -> 13 */));
+ ia64_patch(insn_addr - 1, 0x1fffffffffcUL, val >> 18);
+}
+
+static inline void ia64_imm64 (void *insn, uint64_t val)
+{
+ /* Ignore the slot number of the relocation; GCC and Intel
+ toolchains differed for some time on whether IMM64 relocs are
+ against slot 1 (Intel) or slot 2 (GCC). */
+ uint64_t insn_addr = (uint64_t) insn & ~3UL;
+
+ ia64_patch(insn_addr + 2,
+ 0x01fffefe000UL,
+ ( ((val & 0x8000000000000000UL) >> 27) /* bit 63 -> 36 */
+ | ((val & 0x0000000000200000UL) << 0) /* bit 21 -> 21 */
+ | ((val & 0x00000000001f0000UL) << 6) /* bit 16 -> 22 */
+ | ((val & 0x000000000000ff80UL) << 20) /* bit 7 -> 27 */
+ | ((val & 0x000000000000007fUL) << 13) /* bit 0 -> 13 */)
+ );
+ ia64_patch(insn_addr + 1, 0x1ffffffffffUL, val >> 22);
+}
+
+static inline void ia64_imm60b (void *insn, uint64_t val)
+{
+ /* Ignore the slot number of the relocation; GCC and Intel
+ toolchains differed for some time on whether IMM64 relocs are
+ against slot 1 (Intel) or slot 2 (GCC). */
+ uint64_t insn_addr = (uint64_t) insn & ~3UL;
+
+ if (val + ((uint64_t) 1 << 59) >= (1UL << 60))
+ fprintf(stderr, "%s: value %ld out of IMM60 range\n",
+ __FUNCTION__, (int64_t) val);
+ ia64_patch_imm60(insn_addr + 2, val);
+}
+
+static inline void ia64_imm22 (void *insn, uint64_t val)
+{
+ if (val + (1 << 21) >= (1 << 22))
+ fprintf(stderr, "%s: value %li out of IMM22 range\n",
+ __FUNCTION__, (int64_t)val);
+ ia64_patch((uint64_t) insn, 0x01fffcfe000UL,
+ ( ((val & 0x200000UL) << 15) /* bit 21 -> 36 */
+ | ((val & 0x1f0000UL) << 6) /* bit 16 -> 22 */
+ | ((val & 0x00ff80UL) << 20) /* bit 7 -> 27 */
+ | ((val & 0x00007fUL) << 13) /* bit 0 -> 13 */));
+}
+
+/* Like ia64_imm22(), but also clear bits 20-21. For addl, this has
+ the effect of turning "addl rX=imm22,rY" into "addl
+ rX=imm22,r0". */
+static inline void ia64_imm22_r0 (void *insn, uint64_t val)
+{
+ if (val + (1 << 21) >= (1 << 22))
+ fprintf(stderr, "%s: value %li out of IMM22 range\n",
+ __FUNCTION__, (int64_t)val);
+ ia64_patch((uint64_t) insn, 0x01fffcfe000UL | (0x3UL << 20),
+ ( ((val & 0x200000UL) << 15) /* bit 21 -> 36 */
+ | ((val & 0x1f0000UL) << 6) /* bit 16 -> 22 */
+ | ((val & 0x00ff80UL) << 20) /* bit 7 -> 27 */
+ | ((val & 0x00007fUL) << 13) /* bit 0 -> 13 */));
+}
+
+static inline void ia64_imm21b (void *insn, uint64_t val)
+{
+ if (val + (1 << 20) >= (1 << 21))
+ fprintf(stderr, "%s: value %li out of IMM21b range\n",
+ __FUNCTION__, (int64_t)val);
+ ia64_patch((uint64_t) insn, 0x11ffffe000UL,
+ ( ((val & 0x100000UL) << 16) /* bit 20 -> 36 */
+ | ((val & 0x0fffffUL) << 13) /* bit 0 -> 13 */));
+}
+
+static inline void ia64_nop_b (void *insn)
+{
+ ia64_patch((uint64_t) insn, (1UL << 41) - 1, 2UL << 37);
+}
+
+static inline void ia64_ldxmov(void *insn, uint64_t val)
+{
+ if (val + (1 << 21) < (1 << 22))
+ ia64_patch((uint64_t) insn, 0x1fff80fe000UL, 8UL << 37);
+}
+
+static inline int ia64_patch_ltoff(void *insn, uint64_t val,
+ int relaxable)
+{
+ if (relaxable && (val + (1 << 21) < (1 << 22))) {
+ ia64_imm22_r0(insn, val);
+ return 0;
+ }
+ return 1;
+}
+
+struct ia64_fixup {
+ struct ia64_fixup *next;
+ void *addr; /* address that needs to be patched */
+ long value;
+};
+
+#define IA64_PLT(insn, plt_index) \
+do { \
+ struct ia64_fixup *fixup = alloca(sizeof(*fixup)); \
+ fixup->next = plt_fixes; \
+ plt_fixes = fixup; \
+ fixup->addr = (insn); \
+ fixup->value = (plt_index); \
+ plt_offset[(plt_index)] = 1; \
+} while (0)
+
+#define IA64_LTOFF(insn, val, relaxable) \
+do { \
+ if (ia64_patch_ltoff(insn, val, relaxable)) { \
+ struct ia64_fixup *fixup = alloca(sizeof(*fixup)); \
+ fixup->next = ltoff_fixes; \
+ ltoff_fixes = fixup; \
+ fixup->addr = (insn); \
+ fixup->value = (val); \
+ } \
+} while (0)
+
+static inline void ia64_apply_fixes (uint8_t **gen_code_pp,
+ struct ia64_fixup *ltoff_fixes,
+ uint64_t gp,
+ struct ia64_fixup *plt_fixes,
+ int num_plts,
+ unsigned long *plt_target,
+ unsigned int *plt_offset)
+{
+ static const uint8_t plt_bundle[] = {
+ 0x04, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, /* nop 0; movl r1=GP */
+ 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x60,
+
+ 0x05, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, /* nop 0; brl IP */
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc0
+ };
+ uint8_t *gen_code_ptr = *gen_code_pp, *plt_start, *got_start;
+ uint64_t *vp;
+ struct ia64_fixup *fixup;
+ unsigned int offset = 0;
+ struct fdesc {
+ long ip;
+ long gp;
+ } *fdesc;
+ int i;
+
+ if (plt_fixes) {
+ plt_start = gen_code_ptr;
+
+ for (i = 0; i < num_plts; ++i) {
+ if (plt_offset[i]) {
+ plt_offset[i] = offset;
+ offset += sizeof(plt_bundle);
+
+ fdesc = (struct fdesc *) plt_target[i];
+ memcpy(gen_code_ptr, plt_bundle, sizeof(plt_bundle));
+ ia64_imm64 (gen_code_ptr + 0x02, fdesc->gp);
+ ia64_imm60b(gen_code_ptr + 0x12,
+ (fdesc->ip - (long) (gen_code_ptr + 0x10)) >> 4);
+ gen_code_ptr += sizeof(plt_bundle);
+ }
+ }
+
+ for (fixup = plt_fixes; fixup; fixup = fixup->next)
+ ia64_imm21b(fixup->addr,
+ ((long) plt_start + plt_offset[fixup->value]
+ - ((long) fixup->addr & ~0xf)) >> 4);
+ }
+
+ got_start = gen_code_ptr;
+
+ /* First, create the GOT: */
+ for (fixup = ltoff_fixes; fixup; fixup = fixup->next) {
+ /* first check if we already have this value in the GOT: */
+ for (vp = (uint64_t *) got_start; vp < (uint64_t *) gen_code_ptr; ++vp)
+ if (*vp == fixup->value)
+ break;
+ if (vp == (uint64_t *) gen_code_ptr) {
+ /* Nope, we need to put the value in the GOT: */
+ *vp = fixup->value;
+ gen_code_ptr += 8;
+ }
+ ia64_imm22(fixup->addr, (long) vp - gp);
+ }
+ /* Keep code ptr aligned. */
+ if ((long) gen_code_ptr & 15)
+ gen_code_ptr += 8;
+ *gen_code_pp = gen_code_ptr;
+}
+
+#endif
projects / qemu.git / blobdiff